Fiber optic sensors for rotating components

Christopher S. Baldwin; James S. Sirkis; Thomas Rossmanith

doi:10.1117/12.207715

20 April 1995 Fiber optic sensors for rotating components

Christopher S. Baldwin, James S. Sirkis, Thomas Rossmanith

Author Affiliations +

Proceedings Volume 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation; (1995) https://doi.org/10.1117/12.207715
Event: Smart Structures and Materials '95, 1995, San Diego, CA, United States

Abstract

Rotating components, such as beams and blades, experience vibrations while rotating. Many blades, such as the ones used in rotorcraft, machine tools and turbines, experience fatigue failure due to the vibration of the rotating blade; therefore, optical sensors could indicate when the strain increases to unsafe limits. This paper describes two techniques of implementing optical fibers on rotating components. The first technique to be examined uses an optical slip ring to transmit the light signal from the rotating frame to a stationary photodetector demodulation circuit, that will determine the strain in the beam. The second technique uses an integrated chip mounted on the rotating frame, that records the signal. The signal recorded from the sensor during rotation is downloaded once the rotation has stopped. Preliminary results from the optical slip ring are presented. These results show difficulties in the alignment of such a device.

Citation Download Citation

Christopher S. Baldwin, James S. Sirkis, and Thomas Rossmanith "Fiber optic sensors for rotating components", Proc. SPIE 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation, (20 April 1995); https://doi.org/10.1117/12.207715

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